Earthquake Science

, Volume 23, Issue 5, pp 417–424 | Cite as

Seismic interferometry and estimation of the Green’s function using Gaussian beams

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Abstract

This study investigates seismic interferometry in which the Green’s function is estimated between two receivers by cross-correlation and integration over sources. For smoothly varying source strengths, the dominant contributions of the correlation integral come from the stationary phase directions in the forward and backward directions from the alignment of the two receivers. Gaussian beams can be used to evaluate the correlation integral and concentrate the amplitudes in a vicinity of the stationary phase regions instead of completely relying on phase interference. Several numerical examples are shown to illustrate how this process works. The use of Gaussian beams for the evaluation of the correlation integral results in stable estimates, and also provides physical insight into the estimation of the Green’s function based on seismic interferometry.

Key words

seismic interferometry Gaussian beams Green’s function 

CLC number

P3195.01 

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Copyright information

© The Seismological Society of China and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Department of Earth and Atmospheric SciencesPurdue UniversityWest LafayetteUSA

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